Add trace_wasm_decode_time flag

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index d47a00bd37f64345c6253d5bedf2b950d50f18b1..d469d7b92b58a0ad2d55eb9cc7c2861b3088dff6 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -459,6 +459,7 @@ DEFINE_BOOL(turbo_preserve_shared_code, false, "keep context-independent code")
 #if defined(V8_WASM)
 // Flags for native WebAssembly.
 DEFINE_BOOL(trace_wasm_decoder, false, "trace decoding of wasm code")
+DEFINE_BOOL(trace_wasm_decode_time, false, "trace decoding time of wasm code")
 DEFINE_BOOL(trace_wasm_compiler, false, "trace compiling of wasm code")
 DEFINE_BOOL(wasm_break_on_decoder_error, false,
             "debug break when wasm decoder encounters an error")